Improve Your English C2

Demetra

Improve your English. Livello C1                

Future House Languages S.L

Activate Advanced C1: A Complete Self-Study Course

Demetra

Improve your English livello B2                  

Demetra

Improve your English livello B1                  

Next Level English C1 Advanced: 50 lessons to improve your English conversation: Real-world vocabulary and grammar for speaking success (English Edition)

Future House Languages

Modern English Vocabulary for Advanced Book: A Complete Self-Study Course to Teach Yourself Idioms, Phrasal Verbs, and Collocations in 10 Minutes a Day (with Answers and Audio)

Independently published

100 Practical English Phrasal Verbs              

Prosperity Education

C2 Key Word Transformation: 200 exam-styled practice exercises

150 Advanced Business English Phrasal Verbs: Improve your Speaking and Writing for B2, C1 and C2 Exams, Work or Travel (150 Advanced English) (English Edition)

Collins

Vocabulary: C1